Spring-tooth harrow



(No Model.)

C. S. SHARP. SPRING TOOTH HARROW. N0. 604,271. Patented May 17,1898.

Nrrn raras Q PATENT Brion.

CHARLES S. SHARP, OF'AUBURN, NEW YORK, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE NATIONAL HARROVV COMPANY, OF UTICA,'NEW YORK.

SPRING-TOOTH HARROW.

SPECIFICATION forming part of Letters Patent No. 604,271, dated May 17, 1898.

Application nea Jun-16,1892. serian. 440,289. (Nomade.)

To all whom t may concern:

Be it known that I, CHARLES S. SHARP, of Auburn, county of Cayuga, and State of New York, have invented a new and useful Improvement in Spring-Tooth Harrows, of which the following is a specification.

This invention relates to spring-tooth harrows, and particularly to that class in which two tooth-carrying frame-sections are hingedA together side by side. In close-toothed harrows the space between the inner teeth of the two sections is necessarily greater than the spaces between adjacent lateral teeth in the sections, and in order to avoid or fill this space it has been proposed to mount an additional or supplemental tooth between the two sections. It has, however, been found in practice that the inner side bars of the framesections hold and prevent lateral escape of stones, clods, and rubbish encountered and taken up by the central tooth, thus producing clogging or choking in front of said tooth.

The object of my invention is to prevent the accumulation of rubbish and the consequent clogging or choking, and I effect this by cutting off or shortening the inner side bar of one of the frame-sections and replacing the cut-away portion by an elevated bridge-piece under which clods, stones, and rubbish may pass out laterally from in front of the tooth. In the accompanying drawings, Figure 1 is a plan View of a harrow embodying my nvention. Fig. 2 is a view showing the teeth in two positions, the operative position being indicated by full lines and the inoperative position by broken lines. Fig. Sis a side view of the shortened frame-bar and its bridgepiece.

Referring to the drawings, A A/ designate the two frame-sections, arranged side by side and hinged together. Each frame carries a series of transverse shafts a b c, upon which are mounted the curved spring-teeth d. The shafts are supported above the frame by standards e, which rise from the side bars, and the inner standards of the two frames are formed with lateral hinge-lugs g g, which are bolted together to form hinge connections between the two frames. The inner end of the rear shaft c of one of the frames projects through its support e, and upon the projecting end between the two frames is secured an additional or supplemental tooth h.

The construction and arrangement thus far described differ in no essential feature from what has before been proposed and involves no part of my present invention.

The frames A A are made of angle-iron bent into the form shown, the two frames being in all respects alike except that in frame '6o A both of the side bars extend back the full length, while in frame A the inner side bar, or that adjacent to the frame A, extends back only part way, terminating at a point some distance in advance of the rear row of teeth, 6 5

as best seen in Fig. 1.

p To the top of the standard e, which supports the inner end of the transverse shaft b, isl attached a bar B, WhichI denominate a bridge-bar and which forms a continua- 7o tion of the side bar of the frame. To the rear end of this bridge-piece is bolted or riveted a plate C, in which is formed a bearing for the inner end of the tooth-shaft c and the j end of which is turned out to form a hinge- `7 5 lug, which is connected with the corresponding member on frame A to form ahinge-joint between the two frames.

It will be observed that the central tooth h ing a space between it and the frame A', whereby any object lying in the path of said tooth is thrown oif laterally toward the frame A'. The bridge-piece B, standing in an ele- 'stands close to the side bar of frame A,'leav 8o vated position, permits stones, `clods, or rubbish to escape laterally thereunder, preventing the clogging or choking which would result if the two adjacent side bars were eX- tended back in the saine horizontal plane.

The means for rocking the shafts to throw 9o standing above the adjacent side bar of the roo other section.

2. In a harrow of the character described,

the combination of two side-bar sections hinged together side by side, the inner side bar of one section having a bridge-piece standing above the adjacent side bar of the other section to form a lateral passage for rubbish, and a tooth mounted between the two sections adjacent to said passage.

3. In a harrow of the character described, the combination of two frame-sections hinged together side by side, the inner side bar of one section being shorter than that of the other section, shaft-supporting standards on said frames, tooth-supporting shafts journaled in said standards, a bridge-piece B connected to the top of one of said standards to form an extension of the short side bar, and a tooth mounted between the frame-sections at the rear end of the bridge-piece.

4. In a harrow, the combination of a frame comprising an outside and an inside runner, shaft bearing standards secured thereto, rock-shafts journaled in said standards, and means for rocking said shafts in unison, and another frame having an outside runner, a short inside runner, and an elevated bridgepiece, supported upon it and extending rearwardly and standing above the adjacent runner of the other frame, shaft-bearing standards secured to said frame, rock-shafts journaled therein, and means for rocking said shafts in unison, the two frames being conneted together, substantially as described. 5. In a harrow of the character described, the combination of a frame composed of two angle-iron sections A, A', hin-ged together, the threads of which serve as runners, the section A being bent substantially U shape, presenting two parallel runner-bars, and the section A being bent to include a front end and a single outside runner-bar, and a short inside runner and therefore affording a lateral clearance-passage adjacent the runner of the adjoining section, harrow-teeth supported by said sections and movable with relation thereto, whereby the teeth or runners may be brought into operative position at the will of the operator.

6. In a harrow of the character described, the combination of a frame having shaft-bearing standards, shafts borne by said standards,

and narrow-teeth thereon, and another frame having shaft-bearing standards, shafts borne by them, and harrow-teeth, and pivot connections joining the adjacent shaft-bearing standards of said frames, and operating to support the inner side of one of said frames in elevated position at such connecting-points.

'7. A harrow composed of two runner-bearing sections, the frame of one section being cut away upon the side adjoining the second section, and partially supported where cut away by said second section.

8. -A two-section spring-tooth harrow, one of the sections of which comprises a frame,a pair of runners borne by it, a set of spring barrow-teeth supported by it, and means for varying the relative planes occupied by the teeth and runners, and the other section of which comprises a frame cut away upon the side adjoining the aforesaid section to present a clearance-passage, and partially supported where cut away by said section, a runner at the opposite side borne by said frame, a set of spring barrow-teeth supported by said frame, and means for varying the relative planes occupied by said teeth and runner, substantially as described.

9. In a harrow, the combination of springteeth, with the opposite sections of a frame hinged together, and each comprising draft- ,bars, and top-carrying bars havin g their toothsupporting surfaces arranged in an elevated position but beneath the hinge-pins of said sections and having depending arms at the ends secured to the draft-bars, substantially as described.

l0. A harrow provided with outside and inside runners, a portion of one of said inside runners being removed or elevated, substantially as and for the purpose set forth.

l1. A sectional harrow provided with outside and inside runners, the inside runner of one section being` cut off, and an elevated bar supported thereby to afford a clearing-space for the harrows between the sections.

l2. A sectional harrow provided with outer and inner frame-bars that serve as runners, one of the runners being located centrally of the sections and supporting directly a portion of the frame and also carrying an elevated bar which supports another part of the frame whereby a lateral clearance is afforded between the sections.

In testimony whereof I hereunto set my hand, this 5th dav of July, 1,892, inthe presence of two attest-ing witnesses.

CHARLES S. SHARP.'

Witnesses:

M. J. LOWER, R. BRocKwAY.

ICS 

